The following highways are numbered 551:
Canada
Finland
Korea, South
Norway
- Norwegian National Road 551
United States
- County Route 551 (New Jersey)
- County Route 551 ((Erie County, New York))
- Ohio State Route 551
- Oregon Route 551
- Pennsylvania Route 551
- Puerto Rico Highway 551
Preceded by 550 | Lists of highways 551 | Succeeded by 552 |